Description
The Dormer A002 HSS TiN-Tip 1/8″ is a professional-grade, high-performance jobber length drill bit. As one of the most essential sizes in any toolkit, the 1/8″ bit is the standard tap drill size for No. 5–40 UNC threads and is the primary choice for drilling pilot holes, rivets, and small fasteners. This 1/8″ (3.18mm) bit features Dormer’s flagship TiN-Tip technology. It combines a tough High-Speed Steel (HSS) body with a Titanium Nitride (TiN) coating on the cutting edge. This provides extreme surface hardness at the point of contact while maintaining the flexibility needed to resist snapping—a common issue with bits of this smaller diameter.












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